Physician Profile
Nathan E. Riddell, M.D.
Unclaimed ProfileAbout Dr. Riddell
Based in Worcester, MA, Nathan E. Riddell, M.D. is listed in the NPI registry under cardiovascular disease. Nathan is also listed as specializing in internal medicine. Medicare claims data shows Nathan provided 2,146 services to 1,907 patients. The services billed most often include routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only, ultrasound of heart with color-depicted blood flow, rate, direction and valve function, and routine electrocardiogram (ecg) using at least 12 leads with interpretation and report.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (508) 334-1000
- Email not available
Practice Locations
55 LAKE AVE N
Worcester, MA 01655
1115 Westford St Ste 2
Lowell, MA 01851
Conditions Commonly Evaluated or Treated
Within Cardiovascular Disease generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- AFib
- Congestive heart failure
- Heart attack
- Heart disease
- High blood pressure
- High cholesterol
Coronary and ischemic heart disease
Heart failure and cardiomyopathy
Heart rhythm
Symptoms and functional disorders
Valve and structural heart
Vascular and risk factors
Artery & vascular
Heart inflammation
Heart muscle
- Poor Circulation and Swollen Legs
Heart valves
Vascular disease
Procedures & services
Most searched procedures
Office and noninvasive testing
Advanced imaging
- Cardiac magnetic resonance imaging
- Nuclear cardiac stress imaging
Consultations
Diagnostic testing
Diagnostics
Heart devices
- Biventricular Pacemaker (Cardiac Resynchronization Therapy)
- Implantable Loop Recorder (Cardiac Monitor Implant)
Heart imaging
Heart procedures
Heart rhythm procedures
Imaging
Implants
Recovery & rehabilitation
Vascular imaging
Procedures Most Often Billed to Medicare
2,146 services · 1,907 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Replacement of aortic valve through the skin and femoral artery | Procedure | 33361 |
25 | As often as other peers in Cardiovascular Disease |
| 3d radiographic procedure | Imaging | 76376 |
15 | Less often than most peers in Cardiovascular Disease |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
833 | More often than most peers in Cardiovascular Disease |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | Treatment | 93306 |
254 | As often as other peers in Cardiovascular Disease |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
250 | As often as other peers in Cardiovascular Disease |
| Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | Treatment | 99152 |
50 | As often as other peers in Cardiovascular Disease |
| Ultrasound of heart, follow-up | Treatment | 93308 |
40 | As often as other peers in Cardiovascular Disease |
| Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist | Treatment | 93458 |
34 | As often as other peers in Cardiovascular Disease |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | Treatment | 93306 |
28 | As often as other peers in Cardiovascular Disease |
| Insertion of stents with balloon dilation of coronary artery or branch, single artery or branch | Treatment | 92928 |
28 | As often as other peers in Cardiovascular Disease |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other cardiologists in Worcester 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Replacement of aortic valve through the skin and femoral artery 8
Providers in MA who bill this service to Medicare most often.
Common questions
What is Nathan E. Riddell's specialty?
Nathan E. Riddell is a cardiologist in Worcester, MA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Cardiovascular Disease”.
NPI registry
Where can I find Nathan E. Riddell?
Nathan E. Riddell is listed at 55 Lake Ave N, Worcester, MA 01655. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Nathan E. Riddell?
The number on file is (508) 334-1000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Nathan E. Riddell?
Nathan E. Riddell's National Provider Identifier is 1245670983. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Nathan E. Riddell's education?
Nathan E. Riddell attended Other, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Nathan E. Riddell have?
Nathan E. Riddell has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What is Nathan E. Riddell known for?
According to Medicare billing data, Nathan E. Riddell performs procedures including replacement of aortic valve through the skin and femoral artery; reads or performs imaging such as 3d radiographic procedure; provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report only and ultrasound of heart with color-depicted blood flow, rate, direction and valve function, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Nathan E. Riddell's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Nathan E. Riddell. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.